Commit 4e4f9ae7 authored by Jason Wang's avatar Jason Wang Committed by Anthony Liguori
Browse files

tap: import linux multiqueue constants 



Import multiqueue constants from if_tun.h from 3.8-rc3. A new ifr flag
IFF_MULTI_QUEUE were introduced to create a multiqueue backend by calling
TUNSETIFF with the this flag and with the same interface name many times.

A new ioctl TUNSETQUEUE were introduced. When doing this ioctl with
IFF_DETACH_QUEUE, the queue were disabled in the linux kernel. When doing this
ioctl with IFF_ATTACH_QUEUE, the queue were enabled in the linux kernel.

Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarAnthony Liguori <aliguori@us.ibm.com>
parent 1ceef9f2

net/tap-linux.h

+4 −0
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
#define TUNSETSNDBUF   _IOW('T', 212, int)

#define TUNGETVNETHDRSZ _IOR('T', 215, int)

#define TUNSETVNETHDRSZ _IOW('T', 216, int)

#define TUNSETQUEUE  _IOW('T', 217, int)



#endif
@@ -36,6 +37,9 @@ 
#define IFF_TAP		0x0002

#define IFF_NO_PI	0x1000

#define IFF_VNET_HDR	0x4000

#define IFF_MULTI_QUEUE 0x0100

#define IFF_ATTACH_QUEUE 0x0200

#define IFF_DETACH_QUEUE 0x0400



/* Features for GSO (TUNSETOFFLOAD). */

#define TUN_F_CSUM	0x01	/* You can hand me unchecksummed packets. */